B. P. TalaviaVORA TALPESH VITHALBHAI20101191232023-12-142023-12-142021-09https://krishikosh.egranth.ac.in/handle/1/5810203151garlic, sulphur, SSB, yield, quality, nutrients content & uptake, available nutrients, sulphur fraction A field experiment entitled “Effect of sulphur and sulphur solubilzing bacteria on yield and nutrient uptake by garlic (Allium sativum L.) and on sulphur fraction in soil” was conducted during rabi, 2019-2020 at Instructional Farm, Department of Agronomy, College of Agriculture, Junagadh Agricultural University, Junagadh. The field experiment comprised of 12 treatments having four levels of sulphur (S) viz., 0, 15, 30 and 45 kg ha-1 and three levels of sulphur solubilizing bacteria (SSB) viz., 0, 1, and 2 lit ha-1 carried out in factorial randomized block design (FRBD) repeated thrice were tested in the experiment, in respect of growth parameters, yield, yield attributes, quality parameters, content and uptake of nutrients like N, P, K and S at harvest in bulb & stover of garlic crop, status of soil available nutrients viz., N, P and K at harvest and sulphur fractions like, heat soluble sulphur, organic sulphur, sulphate sulphur, water soluble sulphur, non-sulphate sulphur and total sulphur at harvest as well as bacterial populations in soil at harvest of crop. The experimental soil was medium black calcareous, clayey in nature which was slightly alkaline in reaction, pH2.5 (7.9) and EC2.5 (0.52 dS m-1 ), low in available nitrogen (232.0 kg ha-1 ), medium in available phosphorus (39.5 kg ha-1 ), higher in available potassium (302.36 kg ha-1 ) and medium in sulphur (10.18 ppm). The experimental results revealed that the growth parameters, yield, yield attributes, quality parameters, nutrients content & uptake, soil available nutrients, sulphur fractions and bacterial populations in soil after harvest were significantly influenced by the various levels of sulphur and SSB. The application of 45 kg S ha-1 significantly increased the plant height, diameter of bulb, dry weight of bulb, number of clove, 100 clove weight, bulb yield (6006 kg ha-1 ), stover yield (756 kg ha-1 ), dry bulb yield, TSS and essential oil percentage. Application of 45 kg S ha-1 significantly increased sulphur content in bulb and stover at harvest. Whereas, sulphur application did not exert any significant effect on N, P and K content in bulb and stover of garlic. Application of 45 kg S ha-1 significantly increased the uptake of all the nutrients (N, P, K and S) by bulb and stover of the garlic crop. The effect of sulphur application on available nitrogen, ABSTRACT Abstract ii phosphorus and potassium in soil did not produce any significance influence at harvest of garlic. Application of 45 kg S ha-1 significantly increased heat soluble sulphur, organic sulphur and water soluble sulphur at harvest of garlic except, sulphate sulphur, non-sulphate sulphur in soil at harvest of garlic. The application 2 lit SSB ha-1 significantly increased the plant height, diameter of bulb, dry weight of bulb, number of clove, 100 clove weight, bulb yield (6006 kg ha-1 ), stover yield (756 kg ha-1 ), TSS and essential oil percentage. Application of SSB produced significantly favorable effect on sulphur content in bulb and stover of garlic. Significantly higher values of all these parameters were observed with application of 2 lit SSB ha-1 . While, SSB application did not exert any significant effect on N, P and K content in bulb and stover of garlic except, S content in bulb and stover of garlic. Application of 2 lit SSB ha-1 also significantly increased the uptake of all the nutrients (N, P, K and S) by bulb and stover of garlic crop. The available nitrogen, phosphorus and potassium in the soil after harvest of garlic were remains unaffected under the application of SSB. While, the heat solub sulphur, organic sulphur and water soluble sulphur in soil at harvest, were significantly increased with application of SSB 2 lit SSB ha-1 except, sulphate sulphur, non sulphate sulphur and total sulphur at harvest. Application of SSB significantly increased sulphur solubilizing bacterial populations at harvest in soil while, sulphur application did not produce any significant effect on sulphur solubilizing bacterial populations in soil at harvest of garlic. The significant interaction effects of sulphur and SSB application were observed only in case of diameter of bulb, number of clove, 100 clove weight, dry bulb yield and bulb yield were recorded with combined application of 45 kg S ha-1 and 2 lit SSB ha-1 . The interaction effects of sulphur and SSB were found non-significant with respect to plant height, dry weight of bulb, stover yield, quality parameters, content and uptake of nutrients by plant at harvest, available major nutrients and sulphur fractions in soil at harvest as well as sulphur solubilizing bacterial populations in soil at harvest under investigation. The qualitative highest yield of garlic can be achieved by application of 45 kg S ha-1 along with 2 lit SSB ha-1 in the medium black calcareous soils of South Saurashtra region of Gujarat.EnglishThesis